This trail is called Confine Erbonne (Erbonne Border).
Erbonne is a tiny little village just on the Italian side of the border. Take the only path out of town to the south towards the border, and shortly thereafter you'll cross a bridge over the Torrente Breggia (stream), which marks the border. The trail to Scudellate is a bit technical in places but it eventually tames into a forest road.
You'll pass the Cappella di Sant'Antonio, and along the way, you'll have intermittent views down the whole of the val Muggio (valley) with Monte Bisbino (1,324m/4,237ft) in the background.